Valve-spring compressor



A. B. MINTEH.

VALVE SPRING COMPRESSOR.

APPLICATION FILED MAY I0, ISIS. l 'l ,3 1 5, 383 Patented Sept. 9, 1919.

/Nvewmw A. a. M//V TER l locking the spring.

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iimTTn sTATns PATENT onirica.

ARTHUR B. MINTER, OF RICHMOND, CALIFORNIA.

VALVE-SPRING COMPRESSOR.

Specification of Letters Patent. Pili-,elated Sept. 9, 1919.

applic-anonima May 1o, 191s. serial No. 233,815;

'be employed for compressing a puppetvalve spring, and the object of the 1nvention is to provide one which will so compress said spring and will also lock the same in a compressed position, to permit the easy removal of the device which is used for A further object of this invention is to provide such a tool which can be conveniently operated to perform such a function, notwithstanding variations in design and location of the puppet-valve.

In the accompanying drawing, Figure l is a side view of my valvespring compressor, showing in solid lines the tool when in its released or extended position, and in dotted lines the same when inits position of compression; Fig.` 2 is a front view thereof; Fig. 3 is a detail top plan view of a compressing foot. p

Referring to the drawing, 1, 2, indicate respectively a holding and a compressing member of my improved tool, formed respectively with arms 3, 4, which extend at right angles from their lower ends, and which are sufficiently long to avoid interference with, and obviate the necessity for the removal of, intake and exhaust manifolds and carbureting and ignition devices, and the like, commonly found in close proximity to puppet-valves.

0n the free end of the arm 4 is a removable compressing foot 6, shown in detail in liig. 3, held on said end by a cotter-pin 7. Said foot has a thin or flattened outer portion 8 adapted to straddle a valve stem 9 below the spring 10 thereon. Between the free end of the arm 3, and a plate 11, is clamped, by a bplt 12, washer 13, and thumb-nut 14, a. stay-pin 16, the lower Vend of which can abut against the head 17 of the puppet-valve to hold it in position when the spring is compressed. It will be observed that this arrangement permits the stag-pin 16j-,c be adjusted vertically..

' The member 2 of the tool slide@ in contact with the member 1, and is guided by upper i and lower `guideways 18, 19,the` upper guideway being riveted as shown at 21, to the lower member 2, and surrounding the upper member 1 and the lower guide- `way being riveted, as shown at 22, to the upper member 1 and `surrounding the lower member To raise the lower member 2 for compressing the valve spring, there 1s provided a U-shaped levei1 23 pivoted to the upper end of the member 1 by a pivot-pin 24 extending through a hole in said member 1, through two washers 26, on the opposite side of said member 1, and through the two legs ofthe lever 23.` One leg of said lever is extended'past saidpivot to form a short arm 27 and to said arm 27 is pivotally attached the bent upper end 28 of a rod 29, said upper end extending loosely through a hole in said arm 27. The lower end of said l rod is bent at right angles in the same directien as the upper end, andis attached to said member 2 by inserting it through any one of aplurality of recesses, here shown as holes 31 `arranged in staggered relation in two vertical rows in said lower member 2.

When the stay-pin 16 has been adjusted to abut against the top of the puppet-valve, and the foot 6 has beenplaeed in position straddling the stem of said valve below the spring therearound, said lever 23 is swung about its pivot 24 from an upper to a lower l position, as indicated in the circular dotted line in Fig. 1, the outer or closed end 32 of said lever being reduced in width so as to permit said lever to move as far around as possible when moving to its lowermost position.

The importance of this construction arises from the fact that it is necessary for the pivotal connection between the lever 23 and the rod 29 to move through more than a semi-circle, in order that, while the rod 29 in its lower position is to one side, as to the left, of the vertical line through the pivot 24 of the lever 23, in its upper position it should be to the right of said vertical line, in order that the pressure exercised by said rod 29 on said lever 23 may tend to hold it still more strongly in the position which the lever then occupies. In other words, said pivotal connection should pass its dead center, so that the lower arm 2 may be locked in its position compressino4 the spring. The operator then has his thands te ramova the leaching devise for the Vtool is locked when in its .ingmember is guided toV slide in contact with the holding member, each of said members being bent at one end approximately at right angles, a device attached to the bent Aend of the holding member `to engage the head of a puppet-valve to hold the same ,while its spring is being compressed, -a device carried by the bent end of the compressing member and arranged to engage the end, remote 4from said head, of the valve spring, a lever pivotedV to a portion of' said holding member remote yfrom said bentend and having long and short arms, a tension bar pivotally connected at one end to the short arm `of said lever', the compressing member having a longitudinal series of recesses, each adapted to be engaged by the other end of said tension bar, said lever being provided with means for arresting it when rotating in the direction in Which the bent ends of said members are drawn together'by means of said lever and tension bar, the location of said pivotal connection being such that, in said rotation and before said arrest, it passes to the other side of a plane through the pivot of the lever parallel with the direction of movement of said compressing member.

2. In a tool of the character described, the combination of holding and compressing members having adjacent ends bent substantially at right angles to said members and parallel to each other, means at the said end'of the compressing member' for engaging a spring of the puppet-valve to compress the same, means at said end of the holdingmember for holding the head of the puppet-valve against such compression of the spring, means carried by one of said members and engaging the short member for y guiding the compressing member when said ,bent ends approach each other, a U- shaped lever pivoted to the other end of said holding member and having a short arm extending past said pivot, and a tension barpivoted to said short arm, said other end forming a hook, the compression member having a longitudinal series of recesses any one of which can be engaged by said t hook, said lever being free to swing through the plane passing through the ends of the tension bar and the pivot of the lever and at right angles to the plane in which the lever swings.

ARTHUR B. MINTER.

lVitnesses J. E. CROZIER, VIRGINIA C. GRIFFINS.

Copies of this patent may be obtained forl five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

